Digital Electronics-Memory and Storage
Digital Electronics-Memory and Storage
41. A major disadvantage of the mask ROM is that it:
- is time consuming to change the stored data when system requirements change
- is very expensive to change the stored data when system requirements change
- cannot be reprogrammed if stored data needs to be changed
- has an extremely short life expectancy and requires frequent replacement
42. The periodic recharging of DRAM memory cells is called ________.
- multiplexing
- bootstrapping
- refreshing
- flashing
43. Which of the following is normally used to initialize a computer system's hardware?
- Bootstrap memory
- Volatile memory
- External mass memory
- Static memory
44. What is the difference between static RAM and dynamic RAM?
- Static RAM must be refreshed, dynamic RAM does not.
- There is no difference.
- Dynamic RAM must be refreshed, static RAM does not.
45. Microprocessors and memory ICs are generally designed to drive only a single TTL load. Therefore, if several inputs are being driven from the same bus, any memory IC must be ________.
- buffered
- decoded
- addressed
- stored
47. How many address bits are required for a 4096-bit memory organized as a 512 × 8 memory?
- 2
- 4
- 8
- 9
48. In general, the ________ have the smallest bit size and the ________ have the largest.
- EEPROMs, Flash
- SRAM, mask ROM
- mask ROM, SRAM
- DRAM, PROM
49. Advantage(s) of an EEPROM over an EPROM is/are:
- the EPROM can be erased with ultraviolet light in much less time than an EEPROM
- the EEPROM can be erased and reprogrammed without removal from the circuit
- the EEPROM has the ability to erase and reprogram individual words
- the EEPROM can be erased and reprogrammed without removal from the circuit, and can erase and reprogram individual words
50. The mask ROM is ________.
- permanently programmed during the manufacturing process
- volatile
- easy to reprogram
- extremely expensive